Main Entry:

per·ti·na·cious

Pronunciation:

\ˌpər-tə-ˈnā-shəs\

Function:

adjective

Etymology:

Latin pertinac-, pertinax, from per- thoroughly + tenac-, tenax tenacious, from tenēre

Date:

1626

1 a: adhering resolutely to an opinion, purpose, or design b: perversely persistent2: stubbornly tenacious

synonyms see obstinate

— per·ti·na·cious·ly adverb

— per·ti·na·cious·ness noun

— per·ti·nac·i·ty \-ˈna-sə-tē\ noun